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2 years ago

I need help with 1-3 and 5-6 pls

Mathematics

1 answer:

Romashka-Z-Leto [24]2 years ago

7 0

Answer:
add all the equation for example the first question in there would be like

(note - an equation contains an is equal to sign [=] and if a problem does not have an is equal to sign then it becomes an expression)

Step-by-step explanation:

2n°, 55°, 49°

just add all of them making an equation like

2n° + 55° + 49° = 180° (angle sum property)

2n° + 104 = 108°

2n° = 108° - 104

i.e., 2n° = 76°

n = 76/2 therefore,

n = 38

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4x - 3 = 2x + 7 what would the answer be??

TiliK225 [7]

Answer:

x = 5

Step-by-step explanation:

Step 1: Subtract 2x from both sides.

4x−3−2x=2x+7−2x

Step 2: Add 3 to both sides.

2x−3+3=7+3

Step 3: Divide both sides by 2.

2x/2 = 10/2

x=5

5 0

3 years ago

One large submarine sandwich is divided equally among four people. How much of the sandwich did each person get.

sdas [7]

Answer:

1/4 of the sandwich

Step-by-step explanation:

Lets make 1 the whole sandwich. The sandwich is divided among 4 people so it becomes 1/4.

3 0

3 years ago

Glenn needs to cut pieces of a lanyard that are each 1 meter long to make lanyard key chains. If he has 3 pieces of lanyard that

Novosadov [1.4K]

Answer:

Step-by-step explanation:

3 pieces each 1 dekameter long

1 dekameter = 10 meters

Convert dekameters to meters

3 pieces each 10 meters long

Multiply

Glenn has 30 meters of lanyard

Divide

He can cut 30 1-meter pieces

Hope this helps :)

3 0

3 years ago

An exterior angle of a triangle is 180 degrees.

Lilit [14]

180 degrees of the triage

5 0

2 years ago

Solve 0 = (x – 4)2 – 1 by graphing the related function.

fomenos

Answer:

Therefore, the solutions of the quadratic equations are:

$x=5,\:x=3$

The graph is also attached.

Step-by-step explanation:

The solution of the graph could be obtained by finding the x-intercept.

$y=\left(x-\:4\right)^2-1$

Finding the x-intercept by substituting the value y = 0

$y=\left(x-\:4\right)^2-1$

$\:0\:=\:\left(x\:-\:4\right)^2\:-\:1$ ∵ y = 0

$\left(x-4\right)^2-1=0$

$\left(x-4\right)^2-1+1=0+1$

$\left(x-4\right)^2=1$

$\mathrm{For\:}\left(g\left(x\right)\right)^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}g\left(x\right)=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$\mathrm{Solve\:}\:x-4=\sqrt{1}$

$\mathrm{Apply\:rule}\:\sqrt{1}=1$

$x-4=1$

$x=5$

$\mathrm{Solve\:}\:x-4=-\sqrt{1}$

$\mathrm{Apply\:rule}\:\sqrt{1}=1$

$x-4=-1$

$x=3$

So, when y = 0, then x values are 3, and 5.

Therefore, the solutions of the quadratic equations are:

$x=5,\:x=3$

The graph is also attached. As the graph is a Parabola. It is visible from the graph that the values of y = 0 at x = 5 and x = 3. As the graph is a Parabola.

8 0

3 years ago